<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRolesDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children"
              :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过 for 循环 嵌套渲染二级权限 -->
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" v-for="(item3, i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>


          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit" @click="searchRolesById(scope.row.id)">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete"
            @click="deleteRoles">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加角色 DIALOG -->
    <el-dialog title="添加角色" :visible.sync="addRolesDialogVisible" width="50%" center @close="formRest">

      <!-- DIALOG FORM表单区域 -->
      <el-form :model="addForm" :rules="addFormRefRules" ref="addFormRef">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>

      </el-form>
        <span slot="footer" class="dialog-footer">
        <!-- DIALOG底部 -->
        <el-button @click="addRolesDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoles">确 定</el-button>
      </span>
    </el-dialog>
    </el-dialog>

    <!-- 编辑提交角色表单区域 -->

    <el-dialog title="编辑提交角色" :visible.sync="editRolesDialogVisible" width="50%" @close="editRolesDialogClosed">
      <el-form :model="editRolesForm" :rules="addRolesFormRefRules" ref="editRolesFormRef" >
        <el-form-item label="角色ID">
          <el-input v-model="editRolesForm.roleId"> </el-input>
        </el-form-item>
        <el-form-item label="角色名" prop="roleName">
          <el-input v-model="editRolesForm.roleName"> </el-input>
        </el-form-item>
        <el-form-item label="角色描述" >
          <el-input v-model="editRolesForm.roleDesc"> </el-input>
        </el-form-item>

      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editRolesDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRolesSubmit">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all
        :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
  export default {
    data() {
      return {
      addRolesFormRefRules: {
          roleName: [{
              required: true,
              message: '请输入角色名',
              trigger: 'blur'
            },
            {
              min: 2,
              max: 6,
              message: '长度在 2 到 6 个字符',
              trigger: 'blur'
            }
          ]

        },
      editRolesForm: {
        roleId:'',
        roleName:'',
        roleDesc:''


      },
      editRolesDialogVisible:false,
        // 增加角色验证规则
        addFormRefRules: {
          roleName: [{
              required: true,
              message: '请输入角色名',
              trigger: 'blur'
            },
            {
              min: 3,
              max: 6,
              message: '长度在 3 到 6 个字符',
              trigger: 'blur'
            }
          ]

        },
        addForm: {
          roleName: '',
          roleDesc: ''
        },
        addRolesDialogVisible: false,
        editDialogVisible: false,
        // 所有角色列表数据
        rolelist: [],
        // 控制分配权限对话框的显示与隐藏
        setRightDialogVisible: false,
        // 所有权限的数据
        rightslist: [],
        // 树形控件的属性绑定对象
        treeProps: {
          label: 'authName',
          children: 'children'
        },
        // 默认选中的节点Id值数组
        defKeys: [],
        // 当前即将分配权限的角色id
        roleId: ''
      }
    },
    created() {
      this.getRolesList()
    },
    methods: {
      editRolesDialogClosed() {
         this.$refs.editRolesFormRef.resetFields()
      },

      // 编辑角色提交
      editRolesSubmit() {
        this.$refs.editRolesFormRef.validate(async valid => {
          if (!valid) return
          // 发起修改用户信息的数据请求
          const {
            data: res
          } = await this.$http.put(
            'roles/' + this.editRolesForm.id, {
              roleName: this.editRolesForm.roleName,
              roleDesc: this.editRolesForm.roleDesc
            }
          )

          if (res.meta.status !== 200) {
            return this.$message.error('后端接口无效！请查看分配权限功能')
          }

          // 关闭对话框
          this.editRolesDialogVisible = false
          // 刷新数据列表
          this.getRolesList()
          // 提示修改成功
          this.$message.success('更新角色信息成功！')
        })

      },



      // 表单重置
      formRest() {
        this.$refs.addFormRef.resetFields()
      },


      // 根据ID查询ROLES
     async searchRolesById(id) {

       const {
         data: res
       } = await this.$http.get('roles/' + id)

       if (res.meta.status !== 200) {
         return this.$message.error('查询角色信息失败！')
       }

       this.editRolesForm = res.data
       this.editRolesDialogVisible = true
     },



      // 增加角色
      addRoles() {
        this.$refs.addFormRef.validate(async valid => {
          if (!valid) return;
          const {
            data: res
          } = await this.$http.post("roles", this.addForm);
          if (res.meta.status !== 201) return this.$message.error("添加角色失败");
          this.$message.success("添加角色成功");
          this.addRolesDialogVisible = false;
          this.getRolesList()


        })

      },
      // 获取所有角色的列表
      async getRolesList() {
        const {
          data: res
        } = await this.$http.get('roles')

        if (res.meta.status !== 200) {
          return this.$message.error('获取角色列表失败！')
        }

        this.rolelist = res.data


      },
      // 根据Id删除对应的权限
      async removeRightById(role, rightId) {
        // 弹框提示用户是否要删除
        const confirmResult = await this.$confirm(
          '此操作将永久删除该文件, 是否继续?',
          '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }
        ).catch(err => err)

        if (confirmResult !== 'confirm') {
          return this.$message.info('取消了删除！')
        }

        const {
          data: res
        } = await this.$http.delete(
          `roles/${role.id}/rights/${rightId}`
        )

        if (res.meta.status !== 200) {
          return this.$message.error('删除权限失败！')
        }


        role.children = res.data
      },
      // 展示编辑提交角色的对话框
      async showEditDialog(role) {
        this.roleId = role.id
        // 获取所有权限的数据
        const {
          data: res
        } = await this.$http.get('roles/roleId')

        if (res.meta.status !== 200) {
          return this.$message.error('获取权限数据失败！')
        }

        // 把获取到的权限数据保存到 data 中
        this.rightslist = res.data


        // 递归获取三级节点的Id
        this.getLeafKeys(role, this.defKeys)

        this.setRightDialogVisible = true
      },
      deleteRoles(){
         return this.$message.error('后端接口无效！请查看分配权限功能')
      },

      // 展示分配权限的对话框
      async showSetRightDialog(role) {
        this.roleId = role.id
        // 获取所有权限的数据
        const {
          data: res
        } = await this.$http.get('rights/tree')

        if (res.meta.status !== 200) {
          return this.$message.error('获取权限数据失败！')
        }

        // 把获取到的权限数据保存到 data 中
        this.rightslist = res.data


        // 递归获取三级节点的Id
        this.getLeafKeys(role, this.defKeys)

        this.setRightDialogVisible = true
      },
      // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
      getLeafKeys(node, arr) {
        // 如果当前 node 节点不包含 children 属性，则是三级节点
        if (!node.children) {
          return arr.push(node.id)
        }
        node.children.forEach(item => this.getLeafKeys(item, arr))
      },
      // 监听分配权限对话框的关闭事件
      setRightDialogClosed() {
        this.defKeys = []
      },
      // 点击为角色分配权限
      async allotRights() {
        const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]

        const idStr = keys.join(',')

        const {
          data: res
        } = await this.$http.post(
          `roles/${this.roleId}/rights`, {
            rids: idStr
          }
        )

        if (res.meta.status !== 200) {
          return this.$message.error('分配权限失败！')
        }

        this.$message.success('分配权限成功！')
        this.getRolesList()
        this.setRightDialogVisible = false
      }
    }
  }
</script>

<style lang="less" scoped>
  .el-tag {
    margin: 7px;
  }

  .bdtop {
    border-top: 1px solid #eee;
  }

  .bdbottom {
    border-bottom: 1px solid #eee;
  }

  .vcenter {
    display: flex;
    align-items: center;
  }
</style>
